Geodetický monitoring opěrné zdi SO233 na obchvatu Frýdku-Místku

Abstract

The submitted master thesis deals with geodetic monitoring in order to determine the movements and deformations of buildings, the occurrence of these phenomena, and especially their focus and evaluation. The first part of the thesis theoretically describes the pitfalls of measuring movements and deformations. The second part deals with the application and use on a specific building. The method of precise leveling was chosen to measure vertical movements. A Leica LS10 0.3 mm leveling instrument was used in combination with an invar coded bar with a length of 3 m. The largest measured drop occurs approximately in the middle of the wall, where a total drop of 12 mm was measured. Monitoring of horizontal movements was performed by the polar method from a transient standpoint. The Leica TS16 1" total station was appropriately selected on the basis of accuracy analyzes. The achieved measurement accuracy was determined to be ∅σ_x = ̇1,5 mm and ∅σ_y = ̇2,5 mm in the individual coordinate axes. After extension by the reliability coefficient U_P=2, the limit standard deviation of the method was set to δ_x=3 mm and δ_y=5 mm. The largest detected horizontal movement in the transverse and longitudinal direction reached a size of 3 mm. The measured values when monitoring the retaining wall do not exceed the specified limits, and we can therefore say that these measured movements and deformations do not affect the stability, function or safety of the retaining wall SO 233.